Electronic Science and Technology ›› 2021, Vol. 34 ›› Issue (2): 45-51.doi: 10.16180/j.cnki.issn1007-7820.2021.02.008

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Stability Analysis of Transmission Structure of Rail Transport Conveyor Lifting Subsystem Based on Contact

PU Jianghua,WANG Xuejun,WU Peng,CHEN Mingfang,YANG Xiong   

  1. Faculty of Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming 650500,China
  • Received:2019-11-19 Online:2021-02-15 Published:2021-01-22
  • Supported by:
    National Natural Science Foundation of China(51565021);National Natural Science Foundation of China(51965029)


Rail transport conveyor is a kind of rail transport equipment, which is widely used in railway, metallurgy, mining and other fields. However, the stability of its transmission structure is an urgent problem to be solved in production. In this study, the transmission structure of the lifting subsystem of rail transport conveyor has been taken as the research object. Based on the multi-body dynamics theory and Hertz contact theory, the meshing process of the worm gear and worm in the lifting transmission structure of rail transport conveyor are studied. Additionally, the influence of stiffness coefficient, motor driving speed and transmission distance on the stability of transmission are analyzed. Then, the variation law of contact force between the worm gear and the worm is explored, so as to find out the reasons of affecting the stability of lifting structure. Through the research on the change law of the contact force of the worm gear and worm transmission mechanism in the transmission structure, it is found that the instantaneous impact of contact and the periodic fluctuation of contact force are the main reasons for the instability of the transmission structure of the lifting subsystem. The research work in this paper provids a theoretical basis for both the study of the dynamic characteristics of the worm gear and worm transmission and the design of the new transmission structure of rail transport conveyor.

Key words: rail transport conveyor, lifting system, worm gear and worm driving, stability analysis, Hertz contact theory, contact force

CLC Number: 

  • TP242.3